fedders



J. M. FEDDERS Aug. 28, 1928.

RADIATOR CORE Filed Dec. 16. 1926 2 Sheets-Sheet T1 V AVAVWW 64 V V 4%? VA A A www n m J7 l-brneys J. M; FEDDERS RADIATOR com 2 Sheets-Sheet 2 Filed Dec-16, 1926 J7 H0 r71 eys Patented Aug. 28, 1928.

UNITED srAras PArsNT OFFIQE.

JOHN 1!. rnnnnns, or BUFFALO, new YORK, ASSIGNO-R T rnnnnns MANUFACTUR- me COMPANY IN-C., or BUFFALO, NEW YORK, A CORJPORATION or new YORK.

RADIATOR CORE.

Applicationfiled December 16, 1926. Serial No. 155,267.

This invention relates to a core which is more particularly designed for use in radiators which are used in connection with gas engines for cooling the water employed for preventing excessive heating of the engine, such as radiators employed on automobiles and other automotive vehicles.

It is the object of this invention to provide a core for such radiators which will yield a greater radiating efliciency tor a given amount of metal and which can be assembled rapidly and accurately without exercising great care.

In the accompanying drawings-:- Figure 1 is a fragmentary front elevation of a radiator core embodying one form of my invention.

Figure 2 is a vertical transverse section taken on the correspondingly numbered line in Figure 3.

Figure?) is a top plan view of a portion of the radiator core embodying this invention.

Figure 4 is a horizontal section taken on line 4 1 Fig. 2.

Figure 5 is a vertical longitudinal section taken on line 55, Fig. 2.

Figures 6 and 7 are perspective views of one section of a radiator unit made in accordance with my invention.

Similar characters of reference indicate like parts in the several figures of the drawings.

In its general organization, thisradiator,

corev comprises a plurality of water passages 10 which in the instant case are arranged vertically, and a plurality of air tubes 11, 12, which are arranged between said water passages. v j

Each of the water passages 10 is formed between the opposing sides of two sheet metal strips so that this passage is arranged vertically. Each of these sheet metal strips is preferably made of very thin copper or simi lar metal and is provided at its opposite vertical edges with laterally off-set flanges 13, which are adapted to engage with corresponding flanges 13, of. a companion strip,

while the intermediate part or body of this strip recedes and forms an upright wall 14 which is spaced apart from the companion wall 14'of an adjacent metal strip and forms with the same an upright water passage, conduit, or pipe 10 which is flattened and extendswith its length fore-and-aft of the radiator core. The oil-set flanges 13, 13 at opposite longitudinal edges of the two co-operatmg strips of metal are securely connected with each other by soldering or otherwise to form a leak-tight joint between the same for preventing the escape of water from the core. Each ofl-set edge flange 13 of these radiator core. units is provided at regular intervals with locking beads 8, 9, which project alternately in opposite directions so that the concave side of one set'of beads are arranged on one side of the respective flange and the convex sides of the other set oi? beads are arranged on the same side of this flange. These beads of the several core units are so arranged that upon assembling a plurality of such units the convex faces. er the beads of each unit will engage with the concave faces of the beads of an adjacent unit and thereby securely interlock these units and hold the same against lengthwise displacement relatively to each other. By means of these interlocking beads the several units of a core can be assembled very quickly and held in the proper position relatively to each other and when the interlocked flanges of the units are connected by soldering, a core is obtained having increased strength and not liable to give way under the severest strains to which the same may be subjected while in service. I h

At intervals, each of the sheet, metal strips is provided with laterally projecting loops which are so constructed that the metal of the same is integrally connectedwith the walls ofthe water passages, and form a plurality of air tubes between adjacent water passages, whereby the heat which is conducted from the walls of the water passages to these air tubes is absorbed by the air passing through the same and thereby operates to reduce the temperature of the water which is passing throughthe water passages. Although these air tubes may be of various forms in cross section, the same are preferably of hexagonal form as shown in Figs. 1 and 2. g r H Each of these laterally projecting loops of a metal strip or unit is bent to form one complete air tube 11 of hexagonal form which has'two ofits opposing flat sides arrangedhorizontally at the top and bottom of each tube thereof. I On that longitudinal side of each air tube 11 next to the ompanion wall 145 andflanges' 13 of the respective air tube, the loop forming a complete air tube 11 is connected by means of two webs 1515, with the wall 14 and flanges 13 of the respective metal strip so as to be connected integrally therewith, as shown in Figs 1 and 2. On the opposite longitudinal side of each complete air tube 11, the same is the air tubes of these two strips engage each other at their upper and lower flat sides or facets, and the longitudinal head of each of these strips engages with the wall and oilset flanges of the other strip. 7

The joint between the webs 15-15 of each loop is closed by solder so as to form a leaktight joint there-between, and the beads of the air tubes on one strip are connected with the wall of an opposing strip, and the several air tubes of two adjacent units are connected with each other by solder, thereby securely connecting the several parts of the radiator core and not only preventing the same from leaking, but also forming a very rigid structure which is not likely to give way and cause leakage under severe strains.

When two units are thus assembled, the complete air tubes 11 are arranged in a vertical row and these in connection with the opposing walls of two'adjacent strips, form two vertical rows of half tubes 12, adjacent to the outer sides of the water tube walls.

When a plurality of such units are assem-' bled, the half air tubes on opposite sides of each water tube present the appearanceof complete air tubes, so that a radiator core when viewed from the front, as shown in Fig. 1, presents a honey-comb appearance in which each of'the cells is of hexagonal form.

In order to preserve the hexagonal appearance of the several cells ofthe radiator core and still'permit cross circulation of air between the several air tubes for promoting the cooling efl'ect of the same, each of the air tubes only engages the opposite ends of its upper and lower sides with the corresponding parts of adjacent air tubes, as shown at 18.

In order to permit cross circulation of air from one air tube to another within the body of the core the central parts of the facets of each air tube, preferably the upper and lower facets'thereof', are provided with air openings 20 which are so locatedthat when the several units are assembled these air openings of adjacent units register with each other and provide lateral communication between the longitudinal passages of the same.

The metalclisplaced during the formation of the cross circulation openings 20 of the complete air tubes is not completely removed from these tubes but is merely severed by transverse slits or cuts 21 adjacent to opposite ends of each complete air tube and the metal between the transverse slits of each tube is deflected inwardly in the form of a semi-tubular fin or baffle having a substantially vertical wall 22 connecting at its outer edge with one longitudinal edge of the respective air opening 20, and an inclined wall 23 connected at its outer edge with the other longitudinal edge of said air opening and connected at its inner edge with the inner edge of the companion vertical wall 22. The

7 metal of this fin is stretchedwhile displaced into this form. The two fins on opposite sides of each air tube are arranged reversely to each other so that the vertical wall 22 are parallel and the two inclined walls 23 are parallel but spaced apart. By this means a Z-shaped space is formed within each complete air tube which permits of making the same readily on a mandril of corresponding shape and then easily withdrawing this mandril, thereby simplifying themanufacture of the core. By providing the upper and lower sides of each complete air tube with air openings of the character described and utilizing the metal displaced by the forma tion of these openings as radiating fins or battles, the amount of dead metal in the core is reduced to a minimum because the metallic engagement of adjacent air tubes is confined to the ends thereof to preserve the hexagonal or honeycomb appearance of the core, thereby securing the maximum radiating efficiency for the amount of metal used.

I claim as my invention:

1. A radiator core having a plurality of water passages and a plurality of air tubes arranged between said water passages, each of said water passages having opposing walls formed between two strips of sheet metal which have their opposite longitudinal edges off-set to form flanges engaging one another and their intermediate walls spaced from each other, and each of said strips being provided at intervals with laterally projecting loops'forming air tubes, and the air tubes of one of said strips being arranged in thespace between similar air tubes of an adjacent strip, and the flanges of adjacent wall strips beingprovided with interlocking concave-convex beads.

2. A radiator core having a plurality of also semi-tubular radiating fins, and each fin having a vertical wall connected at its outer edge with the respective air tube at one edge of an air opening thereof and an inclined wall connected at its outer edges with the opposite edge of said opening and connected at its inner edge with the inner edge of said vertical wall.

3. A radiator core having a plurality of water passages and a. plurality of air tubes arranged between said water passages, said air tubes having parts thereof deflected to "form cross circulation openings therein and also semi-tubular radiating fins, and each fin having a vertical wall connected at its outer edge with the respective air tube at one edge of an air opening thereof and an inclined wall connected at its outer edge with the opposite edge of said opening and connected at its inner edge with the inner edge of said vertical wall, each of said air tubes being provided with two of such fins and the inclined walls of said fins being parallel but spaced from each other.

4. A radiator core having a plurality of water passages and a plurality of air tubes arranged between said water passages, each of said water passages having opposing walls formed between two strips of sheet metal which have their opposite longitudinal edges engaging one another and their intermediate parts spaced from each other, and each.

of said strips being provided at intervals with late *ally projecting loops forming air tubes, each of said air tubes being integrally connected on one longitudinal side with one strip and engaging its opposite longitudinal side with an adjacent strip, and each tube being provided internally with a semi-tubular radiating fin.

5. A radiator core comprising a plurality of water passages and a plurality of air passages arranged between the water passages, each of said water passages being formed between two sheet metal strips provided with sages, each of said water passages being formed between two sheet metal strips provided with oft-set flanges at their longitudinal edges whichvengage each other while their intermediate walls are spaced apart,

and each of said strips being provided at intervals with laterally projecting loops forming air tubes, and the air tubes of one strip being arranged between the air tubes of an adjacent strip, and the air tubes of one strip having their ends engaging with the corresponding ends of an air tube of an adjacent strip, while the intermediate parts Of'stlld air tubes are provided with registering air openings, and internal semi-tubular radiating fins consisting of metal displaced by the formation of said openings.

In testimony whereof I hereby aifix my signature.

JOHN M. FEDDERS. 

